fix 32bit build support

Make ASM_CORE, ASM_SCALERS and ENABLE_MMX the defaults for 32bit builds
on intel hosts (the host can be AMD64, as long as the target is 32bits.)

Move mac nasm search into the mac section of the cmake code and stop
defaulting to /usr/bin/nasm, this was screwing up the build on msys2.

Fix src/filters/2xSaImmx.asm to compile and link correctly.

Add nasm to list of mingw deps for ./installdeps-msys2 .

Tested that msys2-built Wx binary runs, including with 2xSaI.

Keyboard doesn't work yet on msys2 builds, but that's a completely
different issue.

CMakeLists.txt

@@ -16,8 +16,26 @@ option( ENABLE_GTK3 "Build the GTK+ GUI" OFF )
 option( ENABLE_WX "Build the wxWidgets port" ON )
 option( ENABLE_DEBUGGER "Enable the debugger" ON )
 option( ENABLE_NLS "Enable translations" ON )
-option( ENABLE_ASM_CORE "Enable x86 ASM CPU cores" OFF )
-option( ENABLE_ASM_SCALERS "Enable x86 ASM graphic filters" OFF )
+
+SET(ASM_CORE_DEFAULT OFF)
+SET(ASM_SCALERS_DEFAULT OFF)
+SET(MMX_DEFAULT OFF)
+
+# turn asm on by default on 32bit x86
+IF(CMAKE_SYSTEM_PROCESSOR MATCHES "[xX]86|[aA][mM][dD]64|[xX]64"
+   AND CMAKE_C_SIZEOF_DATA_PTR EQUAL 4)
+    SET(ASM_CORE_DEFAULT ON)
+    SET(ASM_SCALERS_DEFAULT ON)
+    SET(MMX_DEFAULT ON)
+ENDIF()
+
+option( ENABLE_ASM_CORE "Enable x86 ASM CPU cores" ${ASM_CORE_DEFAULT})
+option( ENABLE_ASM_SCALERS "Enable x86 ASM graphic filters" ${ASM_SCALERS_DEFAULT})
+
+if(ENABLE_ASM_SCALERS)
+    option( ENABLE_MMX "Enable MMX" ${MMX_DEFAULT})
+endif(ENABLE_ASM_SCALERS)
+
 option( ENABLE_LINK "Enable GBA linking functionality" ON )
 option( ENABLE_LIRC "Enable LIRC support" OFF )
 
@@ -29,9 +47,6 @@ ENDIF()
 
 option(ENABLE_FFMPEG "Enable ffmpeg A/V recording" ${FFMPEG_DEFAULT})
 
-if(ENABLE_ASM_SCALERS)
-    option( ENABLE_MMX "Enable MMX" OFF )
-endif(ENABLE_ASM_SCALERS)
 option( ENABLE_GBA_LOGGING "Enable extended GBA logging" ON )
 if( ENABLE_GBA_LOGGING )
    ADD_DEFINITIONS (-DGBA_LOGGING )
@@ -98,12 +113,27 @@ IF(APPLE)
         LINK_DIRECTORIES("/sw/lib")
     ENDIF()
 
+    IF(EXISTS "/usr/local/bin/nasm")
+        SET(CMAKE_ASM_NASM_COMPILER "/usr/local/bin/nasm")
+    ELSEIF(EXISTS "/opt/local/bin/nasm")
+        SET(CMAKE_ASM_NASM_COMPILER "/opt/local/bin/nasm")
+    ENDIF()
+
     IF(EXISTS /usr/local/bin)
         SET(CMAKE_PROGRAM_PATH "${CMAKE_PROGRAM_PATH};/usr/local/bin")
+        IF(EXISTS "/usr/local/bin/nasm")
+            SET(CMAKE_ASM_NASM_COMPILER "/usr/local/bin/nasm")
+        ENDIF()
     ELSEIF(EXISTS /opt/local/bin)
         SET(CMAKE_PROGRAM_PATH "${CMAKE_PROGRAM_PATH};/opt/local/bin")
+        IF(EXISTS "/opt/local/bin/nasm")
+            SET(CMAKE_ASM_NASM_COMPILER "/opt/local/bin/nasm")
+        ENDIF()
     ELSEIF(EXISTS /sw/bin)
         SET(CMAKE_PROGRAM_PATH "${CMAKE_PROGRAM_PATH};/sw/bin")
+        IF(EXISTS "/sw/bin/nasm")
+            SET(CMAKE_ASM_NASM_COMPILER "/sw/bin/nasm")
+        ENDIF()
     ENDIF()
 ENDIF(APPLE)
 
@@ -114,17 +144,9 @@ IF((ENABLE_ASM_CORE OR ENABLE_ASM_SCALERS OR ENABLE_MMX)
     MESSAGE(FATAL_ERROR "The options ASM_CORE, ASM_SCALERS and MMX are not supported on AMD64 yet.")
 ENDIF()
 
-# Check for nasm
-if( ENABLE_ASM_SCALERS )
-    IF(EXISTS "/usr/local/bin/nasm")
-        SET(CMAKE_ASM_NASM_COMPILER "/usr/local/bin/nasm")
-    ELSEIF(EXISTS "/opt/local/bin/nasm")
-        SET(CMAKE_ASM_NASM_COMPILER "/opt/local/bin/nasm")
-    ELSE()
-        SET(CMAKE_ASM_NASM_COMPILER "/usr/bin/nasm")
-    ENDIF()
+IF(ENABLE_ASM_SCALERS)
     ENABLE_LANGUAGE(ASM_NASM)
-endif( ENABLE_ASM_SCALERS )
+ENDIF(ENABLE_ASM_SCALERS)
 
 # Look for some dependencies using CMake scripts
 FIND_PACKAGE(ZLIB REQUIRED)
@@ -474,6 +496,9 @@ SET(SRC_HQ_ASM
 
 if( ENABLE_ASM_SCALERS )
     SET(SRC_FILTERS ${SRC_FILTERS} ${SRC_HQ_ASM})
+    IF(ENABLE_MMX)
+        SET(SRC_FILTERS ${SRC_FILTERS} src/filters/2xSaImmx.asm)
+    ENDIF(ENABLE_MMX)
 else( ENABLE_ASM_SCALERS )
     SET(SRC_FILTERS ${SRC_FILTERS} ${SRC_HQ_C})
     SET(HDR_FILTERS ${HDR_FILTERS} ${HDR_HQ_C})

installdeps-msys2

@@ -2,7 +2,7 @@
 
 cd "$(dirname $0)"
 
-MINGW_DEPS='SDL2 cairo ffmpeg openal sfml wxWidgets zlib binutils cmake crt-git extra-cmake-modules gcc gcc-libs gdb headers-git make pkg-config tools-git windows-default-manifest libmangle-git'
+MINGW_DEPS='SDL2 cairo ffmpeg openal sfml wxWidgets zlib binutils cmake crt-git extra-cmake-modules gcc gcc-libs gdb headers-git make pkg-config tools-git windows-default-manifest libmangle-git nasm'
 MINGW64_DEPS=
 MINGW32_DEPS=
 

src/filters/2xSaImmx.asm

@@ -27,17 +27,10 @@
 
 
 BITS 32
-%ifdef __DJGPP__
 GLOBAL __2xSaILine
 GLOBAL __2xSaISuperEagleLine
 GLOBAL __2xSaISuper2xSaILine
 GLOBAL _Init_2xSaIMMX
-%else
-          GLOBAL _2xSaILine
-          GLOBAL _2xSaISuperEagleLine
-                  GLOBAL _2xSaISuper2xSaILine
-          GLOBAL Init_2xSaIMMX
-%endif
 SECTION .text ALIGN = 32
 
 %ifdef FAR_POINTER
@@ -86,11 +79,7 @@ colorA3   equ 4
 
 
 
-%ifdef __DJGPP__
 __2xSaISuper2xSaILine:
-%else
-_2xSaISuper2xSaILine:
-%endif
 ; Store some stuff
          push ebp
          mov ebp, esp
@@ -825,11 +814,7 @@ _2xSaISuper2xSaILine:
 
 
 
-%ifdef __DJGPP__
 __2xSaISuperEagleLine:
-%else
-_2xSaISuperEagleLine:
-%endif
 ; Store some stuff
          push ebp
          mov ebp, esp
@@ -1405,11 +1390,7 @@ colorN   equ 0
 colorO   equ 2
 colorP   equ 4
 
-%ifdef __DJGPP__
 __2xSaILine:
-%else
-_2xSaILine:
-%endif
 ; Store some stuff
          push ebp
          mov ebp, esp
@@ -1996,11 +1977,7 @@ _2xSaILine:
 ;-------------------------------------------------------------------------
 ;-------------------------------------------------------------------------
 
-%ifdef __DJGPP__
 _Init_2xSaIMMX:
-%else
-Init_2xSaIMMX:
-%endif
 ; Store some stuff
          push ebp
          mov ebp, esp